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"""
Example Airflow DAG for Google Vertex AI service testing Endpoint Service operations.
"""

from __future__ import annotations

import os
from datetime import datetime

from google.cloud.aiplatform import schema
from google.protobuf.struct_pb2 import Value

from airflow.models.dag import DAG
from airflow.providers.google.cloud.operators.vertex_ai.auto_ml import (
    CreateAutoMLImageTrainingJobOperator,
    DeleteAutoMLTrainingJobOperator,
)
from airflow.providers.google.cloud.operators.vertex_ai.dataset import (
    CreateDatasetOperator,
    DeleteDatasetOperator,
    ImportDataOperator,
)
from airflow.providers.google.cloud.operators.vertex_ai.endpoint_service import (
    CreateEndpointOperator,
    DeleteEndpointOperator,
    DeployModelOperator,
    ListEndpointsOperator,
    UndeployModelOperator,
)
from airflow.utils.trigger_rule import TriggerRule

ENV_ID = os.environ.get("SYSTEM_TESTS_ENV_ID", "default")
PROJECT_ID = os.environ.get("SYSTEM_TESTS_GCP_PROJECT", "default")
DAG_ID = "vertex_ai_endpoint_service_operations"
REGION = "us-central1"
IMAGE_DISPLAY_NAME = f"auto-ml-image-{ENV_ID}"
MODEL_DISPLAY_NAME = f"auto-ml-image-model-{ENV_ID}"

RESOURCE_DATA_BUCKET = "airflow-system-tests-resources"

IMAGE_DATASET = {
    "display_name": f"image-dataset-{ENV_ID}",
    "metadata_schema_uri": schema.dataset.metadata.image,
    "metadata": Value(string_value="image-dataset"),
}
IMAGE_DATA_CONFIG = [
    {
        "import_schema_uri": schema.dataset.ioformat.image.single_label_classification,
        "gcs_source": {"uris": [f"gs://{RESOURCE_DATA_BUCKET}/vertex-ai/datasets/flowers-dataset.csv"]},
    },
]

ENDPOINT_CONF = {
    "display_name": f"endpoint_test_{ENV_ID}",
}


with DAG(
    DAG_ID,
    schedule="@once",
    start_date=datetime(2021, 1, 1),
    catchup=False,
    render_template_as_native_obj=True,
    tags=["example", "vertex_ai", "endpoint_service"],
) as dag:
    create_image_dataset = CreateDatasetOperator(
        task_id="image_dataset",
        dataset=IMAGE_DATASET,
        region=REGION,
        project_id=PROJECT_ID,
    )
    image_dataset_id = create_image_dataset.output["dataset_id"]

    import_image_dataset = ImportDataOperator(
        task_id="import_image_data",
        dataset_id=image_dataset_id,
        region=REGION,
        project_id=PROJECT_ID,
        import_configs=IMAGE_DATA_CONFIG,
    )

    create_auto_ml_image_training_job = CreateAutoMLImageTrainingJobOperator(
        task_id="auto_ml_image_task",
        display_name=IMAGE_DISPLAY_NAME,
        dataset_id=image_dataset_id,
        prediction_type="classification",
        multi_label=False,
        model_type="CLOUD",
        training_fraction_split=0.6,
        validation_fraction_split=0.2,
        test_fraction_split=0.2,
        budget_milli_node_hours=8000,
        model_display_name=MODEL_DISPLAY_NAME,
        disable_early_stopping=False,
        region=REGION,
        project_id=PROJECT_ID,
    )
    DEPLOYED_MODEL = {
        # format: 'projects/{project}/locations/{location}/models/{model}'
        "model": "{{ti.xcom_pull('auto_ml_image_task')['name']}}",
        "display_name": f"temp_endpoint_test_{ENV_ID}",
        "automatic_resources": {
            "min_replica_count": 1,
            "max_replica_count": 1,
        },
    }

    # [START how_to_cloud_vertex_ai_create_endpoint_operator]
    create_endpoint = CreateEndpointOperator(
        task_id="create_endpoint",
        endpoint=ENDPOINT_CONF,
        region=REGION,
        project_id=PROJECT_ID,
    )
    # [END how_to_cloud_vertex_ai_create_endpoint_operator]

    # [START how_to_cloud_vertex_ai_delete_endpoint_operator]
    delete_endpoint = DeleteEndpointOperator(
        task_id="delete_endpoint",
        endpoint_id=create_endpoint.output["endpoint_id"],
        region=REGION,
        project_id=PROJECT_ID,
    )
    # [END how_to_cloud_vertex_ai_delete_endpoint_operator]

    # [START how_to_cloud_vertex_ai_list_endpoints_operator]
    list_endpoints = ListEndpointsOperator(
        task_id="list_endpoints",
        region=REGION,
        project_id=PROJECT_ID,
    )
    # [END how_to_cloud_vertex_ai_list_endpoints_operator]

    # [START how_to_cloud_vertex_ai_deploy_model_operator]
    deploy_model = DeployModelOperator(
        task_id="deploy_model",
        endpoint_id=create_endpoint.output["endpoint_id"],
        deployed_model=DEPLOYED_MODEL,
        traffic_split={"0": 100},
        region=REGION,
        project_id=PROJECT_ID,
    )
    # [END how_to_cloud_vertex_ai_deploy_model_operator]

    # [START how_to_cloud_vertex_ai_undeploy_model_operator]
    undeploy_model = UndeployModelOperator(
        task_id="undeploy_model",
        endpoint_id=create_endpoint.output["endpoint_id"],
        deployed_model_id=deploy_model.output["deployed_model_id"],
        region=REGION,
        project_id=PROJECT_ID,
    )
    # [END how_to_cloud_vertex_ai_undeploy_model_operator]

    delete_auto_ml_image_training_job = DeleteAutoMLTrainingJobOperator(
        task_id="delete_auto_ml_training_job",
        training_pipeline_id="{{ task_instance.xcom_pull(task_ids='auto_ml_image_task', "
        "key='training_id') }}",
        region=REGION,
        project_id=PROJECT_ID,
        trigger_rule=TriggerRule.ALL_DONE,
    )

    delete_image_dataset = DeleteDatasetOperator(
        task_id="delete_image_dataset",
        dataset_id=image_dataset_id,
        region=REGION,
        project_id=PROJECT_ID,
        trigger_rule=TriggerRule.ALL_DONE,
    )

    (
        # TEST SETUP
        create_image_dataset
        >> import_image_dataset
        >> create_auto_ml_image_training_job
        # TEST BODY
        >> create_endpoint
        >> deploy_model
        >> undeploy_model
        >> delete_endpoint
        >> list_endpoints
        # TEST TEARDOWN
        >> delete_auto_ml_image_training_job
        >> delete_image_dataset
    )

    # ### Everything below this line is not part of example ###
    # ### Just for system tests purpose ###
    from tests_common.test_utils.watcher import watcher

    # This test needs watcher in order to properly mark success/failure
    # when "tearDown" task with trigger rule is part of the DAG
    list(dag.tasks) >> watcher()

from tests_common.test_utils.system_tests import get_test_run  # noqa: E402

# Needed to run the example DAG with pytest (see: tests/system/README.md#run_via_pytest)
test_run = get_test_run(dag)
